Free Printable Mulțimi

1.

Mulțimea literelor din cuvântul abecedar este:

a)

{a; b;c;e;d;a;r}

b)

{a; b;c;e;r}

c)

{a; b;c;e;d;r}

d)

{a; b;c;d;r}

2.

Scrisă prin enumerarea elementelor sale mulțimea

A={ $x\in N^{\cdot}$ / $x\le3$ } este:

a)

{0, 1, 2, 3}

b)

{1, 2, 3}

c)

{1, 2}

d)

{0, 1, 2)

3.

Cardinalul mulțimii: $A=\left\{a;\ b;\ c;\ d\right\}$ este:

a)

1

b)

2

c)

0

d)

4

4.

Mulțimea B din diagrama alăturată este egală cu:

a)

$\left\{1,\ 2,\ 4,\ 5,\ 6\right\}$

b)

$\left\{2,\ 5,\ 3,\ 7\right\}$

c)

$\left\{1,\ 4,\ 6\right\}$

d)

$\left\{3,\ 7\right\}$

5.

Se dau mulțimile: $A=\left\{1,\ 2,\ 3,\ 5\right\}$ ; $B=\left\{2,\ 3,\ 4,\ 6,\ 7\right\}$ . $A\cup B\$ este:

a)

$\left\{1,\ 2,\ 3,\ 5,\ 4,\ 6,\ 7\right\}$

b)

$\left\{2,\ 3\right\}$

c)

$\left\{1,\ 2,\ 3,\ 4,\ 5,\ 5,\ 6,\ 7\right\}$

d)

$\left\{1,,\ 5\right\}$

6.

$A=\left\{1,\ 2,\ 3,\ 5\right\}$ ; $B=\left\{0,\ 1,\ 2,\ 4,\ 6\right\}$ . $A\cap B$ este:

a)

$\phi$

b)

$\left\{1,2\right\}$

c)

$\left\{1,\ 3,\ 5\right\}$

d)

$\left\{0,\ 1,\ 2,\ 3,\ 4,\ 5,\ 6\right\}$

7.

$A=\left\{1,\ 2,\ 3,\ 5\right\};\ B=\left\{2,\ 3,\ 4,\ 6,\ 7\right\}.\ A-B=....$

a)

$\left\{1,\ 5\right\}$

b)

$\left\{2,\ 3\right\}$

c)

$\phi$

d)

$\left\{4,\ 6,\ 7\right\}$

8.

$A=\left\{1,\ 2,\ 3,\ 5\right\};\ B=\left\{0,\ 1,\ 2,\ 4,\ 6\right\};\ C=\left\{2,\ 3,\ 4,\ 6,\ 7\right\}.$ $\left(A\cup C\right)-B=...$

a)

$\left\{0,\ 1,\ 2,\ 3,\ 4,\ 5,\ 6,\ 7\right\}$

b)

$\left\{1,\ 2,\ 4,\ 6\right\}$

c)

$\left\{0\right\}$

d)

$\left\{3,\ 5,\ 7\right\}$

9.

$A=\left\{1,\ 2,\ 3,\ 5\right\};\ B=\left\{0,\ 1,\ 2,\ 4,\ 6\right\};\ C=\left\{2,\ 3,\ 4,\ 6,\ 7\right\}.$ $\left(A\cap B\right)\cup\left(A\cap C\right)=...$

a)

$\left\{1,\ 2,\ 3\right\}$

b)

$\left\{1,\ 2,\ 3,\ 4,\ 5,\ 6,\ 7\right\}$

c)

$\left\{2,\ 4,\ 6,\ 8\right\}$

d)

$\phi$

10.

$A=\left\{1,\ 2,\ 3,\ 5\right\};\ B=\left\{0,\ 1,\ 2,\ 4,\ 6\right\};\ C=\left\{2,\ 3,\ 4,\ 6,\ 7\right\}.$ $\left(A\cup B\right)\cap\left(A\cup C\right)=...$

a)

$\left\{1,\ 2\right\}$

b)

$\left\{1,\ 2,\ 3,\ 4,\ 5,\ 6,\ 7\right\}$

c)

$\left\{1,\ 2,\ 3,\ 4,\ 5,\ 6\right\}$

d)

$\left\{0,\ 1,\ 2,\ 3,\ 4,\ 5,\ 6,\ 7\right\}$

11.

$A=\left\{a\in N\ ,\ a=2\cdot n,\ n\in N^{\cdot},\ n\le3\right\}$

Scrieți elementele mulțimii.

a)

$\left\{1,\ 2,\ 3\right\}$

b)

$\left\{0,\ 2,\ 4,\ 6\right\}$

c)

$\left\{0,\ 1,\ 2,\ 3\right\}$

d)

$\left\{2,\ 4,\ 6\right\}$

12.

$A=\left\{2,\ 4,\ 6\right\};\ B=\left\{b\in N,\ b=a-1,\ a\in A\right\}.\ B=...$

a)

$\left\{1,\ 3,\ 5\right\}$

b)

$\left\{2,\ 4,\ 6\right\}$

c)

$\left\{1,\ 3,\ 5,\ 7,\ ....\right\}$

d)

$B=A$

13.

$B=\left\{1,\ 3,\ 5\right\}$ $C=\left\{c\in N,\ c=2b-1,\ b\in B\right\}$ Mulțimea C este:

a)

$\left\{2,\ 6,\ 10\right\}$

b)

$\left\{1,\ 5,\ 9\right\}$

c)

$N$

d)

$\phi$

14.

Mulțimea divizorilor lui 24 este:

a)

\left\{1,\ 2,\ 3,\ 4,\ 6,\ 8,\ 12,\ 24\right\}

b)

$\left\{0,\ 12,\ 24\right\}$

c)

$\left\{0,\ 24,\ 48,\ ....\right\}$

d)

$\left\{0,\ 1,\ 2,\ 3,\ 4,\ 8,\ 9,\ 12,\ 24\right\}$

15.

Mulțimea multiplilor lui 5 mai mari decat 23 și mai mici decât 48 este:

a)

\left\{25,\ 30,\ 35,\ 40,\ 45\right\}

b)

$\left\{0,\ 5,\ 10,\ 15,\ ...\right\}$

c)

$\left\{1,\ 5\right\}$

d)

$\phi$

Mulțimi

Total questions: 15

Worksheet time: 47mins

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